When it comes to walking, we're often told that 10,000 is the number of steps we need to be taking each day for health. However, new research shows that might not be the miracle number we should be striving (or -- as Chris Hipkins put it -- spreading our legs) for. The 10,000 steps a day for health theory has been around since the 1970s, although it hasn't been supported with scientific evidence. A team led by the University of Massachusetts' physical activity epidemiologist Amanda Paluch looked at the association of steps and mortality and found that 7,000 steps per day could be the new target for middle-aged people. Professor Paluch is with us to discuss the study.